popular and money saving - sprecher + schuhas a manual motor starter for individual circuits, and...

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Series KT7Motor Circuit Controllers

Versatile, convenientand space saving…for a variety of applications

Sprecher+Schuh’s KT7 series of Motor Circuit Controllers are some of the most versatile and technologically advanced control products available today.

In one small package, KT7s combine the functions of:• Current limiting short circuit protec-

tion• Class 10 thermal overload

protection• Switching and• Signaling

These devices can be used in a wide variety of control schemes that reduce panel space, simplify installation and eliminate the need for more expensive equipment.

Increased ratings…Sprecher+Schuh’s KT7 controller fam-ily offers higher interrupting capacities (KAIC ratings) and improved Type 2 Coordination and Type E (life after short-circuit). The KTA7-25H/32H offers the option of higher short-circuit current ratings (SCCR) than the standard interrupting capacity of the KTA7-25S/32S Motor Controllers. KTA7 is also available in frames up to 45A. KTC7 can be used with High Efficiency motors. KTB7 Magnetic Only controllers can be combined with CA7 contactors and CEP7 overloads to provide additional features. KTV7 series motor controllers are suitable for application at the output of variable frequency drive (VFD) in multi-motor installations.

Designed for multiple applicationsUL rules allow KT7 Motor Circuit Controllers to be used in a wide variety of applications including:

• Manual Starter Applications• Traditional Group Motor Applications

with compliance to the Tap Conduc-tor Ratings

• Motor Disconnect Applications• Self-Protected Manual Combination

Starter Applications (Type E)• Individual Combination Starter Ap-

plications (Type E/F)• Multi-motor Starter Combination

Applications (Type E/F)

45mm(≈1 3/4˝)

25…32AStandard Interrupting Capacity

45mm(≈1 3/4˝)

25…32AHigh Interrupting Capacity

54mm(≈2 1/8˝)

45AHigh Interrupting Capacity

See our online white paper

Methodsof Applying

KT7Motor Circuit Controllers

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Multi-motor applications… Popular and money savingBecause of the KT7’s Construction Type E – UL Rating as a self-protected combination starter, many group motor installations can utilize an even simpler design and less expensive equipment. The result is minimum panel size and maximum flexibility while avoiding cumbersome NEC group motor instal-lation rules.

Construction Type E ListingAdvanced current limiting and breaking capacity has allowed KT7s to be UL / CSA listed as self-protected (Construc-tion Type E) manual combination mo-tor controllers. This eliminates the need for an upstream fuse or circuit breaker when using the KT7 as a manual mo-tor starter. In addition, KT7s also meet

KT7s meet UL requirements for Type E manual motor controllers and “at-motor disconnects”

Excellent short circuit protection characteristicsIn the event of a short-circuit, the contacts are opened by magnetic, non-adjusting tripping elements in times approaching 2/1000 of a second. This results in the extremely rapid buildup of an arc voltage which limits the cur-rent of the short-circuit to a very low level. Because of this superb current limiting capability, KTA Motor Circuit Controllers have a short circuit capacity of up to 65kA at 480Y/277V and up to 47kA at 600Y/347V (see illustration below).

Superb thermal overload protectionEvery KT7 device is individually cali-brated at the factory for the smallest and largest current it can handle. When coupled with automatic ambient tempera-ture compensation over a range of -25°C to +60°C, very accurate thermal overload protection is obtained. In addition, the KT7 is a Class 10 device… it trips within 10 seconds under locked rotor conditions (6 x FLA). This better protects today’s T-Frame motors.

Special units for special applications

KTC7 controllers are available with a fixed magnetic trip set at 16…20x the maximum value of the current adjustment range (as opposed to 13x for the KTA7). This prevents nuisance tripping in applications utiliz-ing high efficiency motors for example. The KTB7 Magnetic

Only model is available without the thermal trip feature for special applica-tions where a separate motor overload is required.

Other protection featuresAll KT7 Motor Circuit Controllers provide accelerated tripping under single phase conditions. This is accomplished with a special “differential tripping” mechanism built into each device.

Using KT7s in Multi-Motor Starter applications can replace classic Branch Circuit Protection Devices and reduce panel space up to 60%

UL requirements for “at-motor discon-nects,” which means they can be used in an enclosure with a lockable handle as a manual motor starter for individual circuits, and are also an approved means of motor disconnect.

Type E + Combo starter + Economy = “Ecombo” starterWhen the KT7 self-protected manual combination starter is combined with Sprecher + Schuh’s CA7 contactor to provide remote operation, we now have an alternative to the classic combination starter. We call these “Ecombo” starters, which save significant dollars and panel space over conventional combo starters. Ecombo starters are available for ap-plications up to 45 Amperes (30 HP @ 460V).

See a complete explanation of Ecombo starters beginning on page F58 of this catalog.

30kA

25kA

50kA

65kA

KT7-45HKT7-25HKT7-25S

65kA

Manual Motor Starter Ratings

All KT7 Motor Circuit Controllers offer accelerated tripping under single phase conditions

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Motor Circuit ControllerSeries KTA7

KTA7 Base Unit

Horsepower ratings shown in the table are for reference only. The final selection of the controller depends on the actual motor full load current and service factor.• For motor with service factor less than 1.15. Use motor nameplate full load

current times 0.9 and choose the motor starter with the appropriate current range. Example: Motor F.L.C. = 4.2A; S.F. = 1.0. – 4.2A x 0.9 = 3.78A. Select Catalog Number KTA7-25S-4A.

Catalog Number KTA7-45H

Catalog Number KTA7-25H

Catalog Number KTA7-25S

Maximum Horsepower

Current Adjustment Range [A]

Magnetic Release

Response Current [A] Catalog Number Price

Typical Single Phase

Typical Three Phase [HP]

115V 230V 200V 230V 460V 575VKTA7-25…32S — Standard Interrupting Capacity

~ ~ ~ ~ ~ ~ 0.10...0.16 2.1 KTA7-25S-0.16A 207.30 ~ ~ ~ ~ ~ ~ 0.16...0.25 3.3 KTA7-25S-0.25A 207.30 ~ ~ ~ ~ ~ 1/4 0.25...0.40 5.2 KTA7-25S-0.4A 207.30 ~ ~ ~ ~ 1/4 1/3 0.40...0.63 8.2 KTA7-25S-0.63A 223.88 ~ ~ ~ ~ 1/2 3/4 0.63...1.0 13 KTA7-25S-1A 229.07 ~ 1/10 1/4 1/3 1 1 1.0...1.6 21 KTA7-25S-1.6A 236.33

1/10 1/6 1/2 3/4 1-1/2 2 1.6...2.5 33 KTA7-25S-2.5A 244.61 1/8 1/3 1 1 3 3 2.5...4 52 KTA7-25S-4A 244.61 1/4 3/4 1-1/2 2 5 5 4...6.3 82 KTA7-25S-6.3A 244.61 1/2 1-1/2 3 3 7-1/2 10 6.3...10 130 KTA7-25S-10A 261.20 1 3 5 5 10 15 10...16 208 KTA7-25S-16A 276.74

1-1/2 3 5 7-1/2 15 20 14.5...20 260 KTA7-25S-20A 297.48 2 3 7-1/2 7-1/2 20 20 18...25 325 KTA7-25S-25A 315.10 2 5 7-1/2 10 20 25 24...29 406 KTA7-32S-29A 370.03 3 5 7-1/2 10 25 30 27...32 448 KTA7-32S-32A 370.03

KTA7-25…32H — High Interrupting Capacity1/10 1/6 1/2 3/4 1-1/2 2 1.6...2.5 33 KTA7-25H-2.5A 298.52 1/8 1/3 1 1 3 3 2.5...4 52 KTA7-25H-4A 298.52 1/4 1/2 1-1/2 2 5 5 4...6.3 82 KTA7-25H-6.3A 298.52 1/2 1-1/2 3 3 7-1/2 10 6.3...10 130 KTA7-25H-10A 318.21 1 3 5 5 10 15 10...16 208 KTA7-25H-16A 341.01

1-1/2 3 5 7-1/2 15 20 14.5...20 260 KTA7-25H-20A 354.48 2 3 7-1/2 7-1/2 20 20 18...25 325 KTA7-25H-25A 383.51 2 5 7-1/2 10 20 25 24...29 406 KTA7-32H-29A 467.47 3 5 7-1/2 10 25 30 27...32 448 KTA7-32H-32A 467.47

KTA7-45H — High Interrupting Capacity1/2 1-1/2 3 3 7-1/2 7-1/2 6.3...10 130 KTA7-45H-10A 484.05 1 3 5 5 10 10 10...16 208 KTA7-45H-16A 484.05

1-1/2 3 5 7-1/2 15 15 14.5...20 260 KTA7-45H-20A 484.05 2 3 7-1/2 10 20 20 18...25 325 KTA7-45H-25A 511.00 3 5 7-1/2 10 25 30 23...32 416 KTA7-45H-32A 558.68 3 7-1/2 10 15 30 40 32...45 585 KTA7-45H-45A 623.98

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KTA7 UL Ratings Application Chart

Motor Circuit ControllerSeries KTA7

➊ UL 508, CSA 22.2 No. 14 for group installation, in connection with short-circuit protection device.

➋ UL 508 Part III.➌ UL 508 Part IV.➍ Type E applications require use of the KT7-xx-TE terminal adaptor on KT7s.

Alternatively, compact busbar supply block KT7-_-A2E or -A3E meet Type E requirements for terminal spacing.

➎Requireslockabletwistknob(KT7-KN1orKT7-KRY1pageF16)orlockabledoorcouplinghandle(KT7-HTNorKT7-HTRYpageF15).

It should be noted that the KT7 Manual Motor Circuit Controller, when listed as aself-protected(TypeE)device,isratedforWye-connectedpowersystemsfor voltages above 240 volts (i.e. 480Y/277 volts common in the United States or600Y/347voltscommoninCanada).

Device

Manual Motor Starter

Manual Controller for Group Installation ➊

Manual Controller as Motor

Disconnect ➋➎

Suitable for Tap Conductor Protection

Self-Protected Type E Manual Combination

Controller ➌➍➎

Max. Short Circuit Current [kA]

Max. Fuse or Circuit Breaker





480V 600V 480V 600V 480V 600V 480Y/277V 600Y/347V 480Y/277V 600Y/347VKTA7-25…32S — Standard Interrupting Capacity

KTA7-25S-0.16A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-0.25A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-0.4A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-0.63A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-1A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-1.6A 65 47 450 65 47 65 47 65 47 65 47KTA7-25S-2.5A 65 30 450 65 30 65 30 65 30 65 30KTA7-25S-4A 65 25 450 65 25 65 25 65 25 65 25KTA7-25S-6.3A 65 30 450 65 30 65 30 65 ~ 65 ~KTA7-25S-10A 65 30 450 65 30 65 30 65 ~ 65 ~KTA7-25S-16A 30 30 450 30 30 30 30 30 ~ 30 ~KTA7-25S-20A 30 30 450 30 30 10 10 10 ~ 10 ~KTA7-25S-25A 25 10 450 25 10 10 5 ~ ~ ~ ~KTA7-32S-29A 25 30 450 25 30 10 ~ ~ ~ ~ ~KTA7-32S-32A 25 30 450 25 30 10 ~ ~ ~ ~ ~

KTA7-25…32H — High Interrupting CapacityKTA7-25H-2.5A 65 30 450 65 30 65 30 65 30 65 30KTA7-25H-4A 65 30 450 65 30 65 30 65 30 65 30KTA7-25H-6.3A 65 30 450 65 30 65 30 65 30 65 30KTA7-25H-10A 65 30 450 65 30 65 30 65 30 65 30KTA7-25H-16A 65 30 450 65 30 65 30 65 30 65 30KTA7-25H-20A 65 30 450 65 30 65 30 65 ~ 65 ~KTA7-25H-25A 30 30 450 30 30 30 30 30 ~ 30 ~KTA7-32H-29A 30 30 450 30 30 30 18 ~ ~ ~ ~KTA7-32H-32A 30 30 450 30 30 30 18 ~ ~ ~ ~

KTA7-45H — High Interrupting CapacityKTA7-45H-10A 65 30 600 65 30 65 30 65 30 65 30KTA7-45H-16A 65 30 600 65 30 65 30 65 30 65 30KTA7-45H-20A 65 30 600 65 30 65 30 65 30 65 30KTA7-45H-25A 65 30 600 65 30 65 30 65 30 65 30KTA7-45H-32A 65 30 600 65 30 65 30 65 30 65 30KTA7-45H-45A 65 18 600 65 18 65 18 65 ~ 65 ~

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Motor Circuit ControllerSeries KTC7

KTC7 Base Unit ➊

KTC7-25S

Horsepower ratings shown in the table are for reference only. The final selection of the controller depends on the actual motor full load current and service factor. • For motor with service factor less than 1.15. Use motor nameplate full load current times 0.9 and choose the motor starter with the appropriate current range. Example: Motor F.L.C. = 4.2A; S.F. = 1.0. – 4.2A x 0.9 = 3.78A. Select Catalog Number KTC7-25S-4A.

➊ Magnetic trip is fixed at 16…21x the maximum value of the current adjustment range.

DescriptionThe KTC7 has a fixed magnetic trip set at 16…21x the maximum value of the current adjustment range (as opposed to the KTA7s magnetic trip of approximately 13x current adjustment range).KTC7aretypicallyusedinapplications where nuisance tripping might occur, as with some high efficiency motors.

Maximum Horsepower


Magnetic Release




115V 230V 200V 230V 460V 575VKTC7-25S — Standard Interrupting Capacity

~ ~ ~ ~ ~ ~ 0.10...0.16 3.2 KTC7-25S-0.16A 216.63 ~ ~ ~ ~ ~ ~ 0.16...0.25 5.2 KTC7-25S-0.25A 216.63 ~ ~ ~ ~ ~ 1/4 0.25...0.40 8.2 KTC7-25S-0.4A 216.63 ~ ~ ~ ~ 1/4 1/3 0.40...0.63 13 KTC7-25S-0.63A 250.83 ~ ~ ~ ~ 1/2 3/4 0.63...1.0 21 KTC7-25S-1A 253.95 ~ 1/10 1/4 1/3 1 1 1.0...1.6 33 KTC7-25S-1.6A 262.24

1/10 1/6 1/2 3/4 1-1/2 2 1.6...2.5 52 KTC7-25S-2.5A 267.42 1/8 1/3 1 1 3 3 2.5...4 82 KTC7-25S-4A 267.42 1/4 3/4 1-1/2 2 5 5 4...6.3 130 KTC7-25S-6.3A 267.42 1/2 1-1/2 3 3 7-1/2 10 6.3...10 208 KTC7-25S-10A 282.97 1 3 5 5 10 15 10...16 260 KTC7-25S-16A 292.29

KTC7-25H — High Interrupting Capacity1 3 5 5 10 10 10...16 260 KTC7-25H-16A 355.53

1-1/2 3 5 7-1/2 15 20 14.5...20 325 KTC7-25H-20A 373.14 KTC7-45H — High Interrupting Capacity

2 3 7-1/2 10 20 25 18...25 416 KTC7-45H-25A 535.87 3 5 7-1/2 10 25 30 23...32 585 KTC7-45H-32A 585.63

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Motor Circuit ControllerSeries KTC7

KTC7 UL Ratings Application Chart

➊ UL 508, CSA 22.2 No. 14 for group installation, in connection with short-circuit protection device.

➋ UL 508 Part III.➌ UL 508 Part IV.➍ Type E applications require use of the KT7-xx-TE terminal adaptor on KT7s.



It should be noted that the KT7 Manual Motor Circuit Controller, when listed asaself-protected(TypeE)device,isratedforWye-connectedpowersystems for voltages above 240 volts (i.e. 480Y/277 volts common in the UnitedStatesor600Y/347voltscommoninCanada).

Device




Disconnect ➋➎





Max. Fuse or Circuit

Breaker





480V 600V 480V 600V 480V 600V 480Y/277V 600Y/347V 480Y/277V 600Y/347V

KTC7-25S — Standard Interrupting Capacity

KTC7-25S-0.16A 65 47 450 65 47 65 47 65 47 65 47

KTC7-25S-0.25A 65 47 450 65 47 65 47 65 47 65 47

KTC7-25S-0.4A 65 47 450 65 47 65 47 65 47 65 47

KTC7-25S-0.63A 65 47 450 65 47 65 47 65 47 65 47

KTC7-25S-1A 65 47 450 65 47 65 47 65 47 65 47

KTC7-25S-1.6A 65 47 450 65 47 65 47 65 30 65 30

KTC7-25S-2.5A 65 25 450 65 25 65 25 65 25 65 25

KTC7-25S-4A 65 30 450 65 30 65 30 65 ~ 65 ~

KTC7-25S-6.3A 65 30 450 65 30 65 30 65 ~ 65 ~

KTC7-25S-10A 30 30 450 30 30 30 30 30 ~ 30 ~

KTC7-25S-16A 30 30 450 30 30 10 10 10 ~ 10 ~

KTC7-25H — High Interrupting Capacity

KTC7-25H-16A 65 30 450 65 30 65 30 65 30 65 30

KTC7-25H-20A 30 30 450 30 30 30 30 30 ~ 30 ~

KTC7-45H — High Interrupting Capacity

KTC7-45H-25A 65 30 600 65 30 65 30 65 30 65 30

KTC7-45H-32A 65 30 600 65 18 65 18 65 18 65 18

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Motor Circuit ControllerSeries KTB7

KTB7 Base Unit ➋

KTB7-25S

DescriptionThe KTB7 is designed without a thermal trip element (i.e., current adjustment range).Itshouldbeselectedforapplications where a separate motor overload protection device is used, such as on CLT7 Three Component Starters on page F76. Magnetic trip is the same as the KTA7 (approximately 13x operationalcurrent).

Maximum Horsepower

➊Rated

Operational Current [A]

Magnetic Release




115V 230V 200V 230V 460V 575VKTB7-25S — Standard Interrupting Capacity

~ ~ ~ ~ ~ 1/4 0.40 5.2 KTB7-25S-0.4A 202.12 ~ ~ ~ ~ 1/2 3/4 1.0 13 KTB7-25S-1A 222.85

1/10 1/6 1/2 3/4 1-1/2 2 2.5 33 KTB7-25S-2.5A 235.28 KTB7-25…32H — High Interrupting Capacity

1/10 1/6 1/2 3/4 1-1/2 2 2.5 33 KTB7-25H-2.5A 267.42 1/8 1/3 1 1 3 3 4 52 KTB7-25H-4A 267.42 1/2 1-1/2 3 3 7-1/2 10 10 130 KTB7-25H-10A 293.34 1 3 5 5 10 15 16 208 KTB7-25H-16A 314.07 2 3 7-1/2 7-1/2 20 20 25 325 KTB7-25H-25A 361.74 3 5 7-1/2 10 25 30 32 448 KTB7-32H-32A 446.73

KTB7-45H — High Interrupting Capacity2 3 7-1/2 10 20 25 25 325 KTB7-45H-25A 485.09 3 5 7-1/2 10 25 30 32 416 KTB7-45H-32A 543.13 3 7-1/2 10 15 30 40 45 585 KTB7-45H-45A 612.58

➊ APPLICATION NOTE: Product Selection for Heavy Duty Starting Applications using KTB7-25S, KTB7-25H/32H and KTB7-45H Motor Circuit Controllers

The KTB7 Motor Circuit Controller is designed and tested to protect a motor circuit in case of a short circuit. A separate Sprecher + Schuh CEP7-EE_ overload relay with selectable trip class should be used to protect the motor against overload. In Applications with motor starting times exceeding 10 seconds (heavydutystarting)theratedoperationalcurrent(Ie)ofthemotorFLAmust be multiplied by the following factors for selection of the KTB7 Motor Circuit Controller KTB7-25S, KTB7-25H/32H and KTB7-45H.

Trip classes according to UL 508 Section 52 and IEC 60947-4-1CLASS 10 = 1.00 CLASS 15 = 1.22 CLASS 20 = 1.42CLASS 25 = 1.58 CLASS 30 = 1.73The maximum number of motor starts in 25 cycles/hour with a minimum OFF-time of 120 seconds between cycles. This additional calculation and selectingalargerframesizeisnecessarytocompensate(dissipate)the

increased heat resulting from long acceleration applications effecting the rated operational current of the KTB7.

Application Example:Motor 480 VAC, 10 HP, Ie 14 FLA Heavy duty starting application with start time of up to 18 seconds

Solution: Starting time up to 18 seconds requires dimensioning for CLASS 20.• Selection of the Motor Circuit Controller for Short Circuit Protection:

Multiply the rated operational current Ie with factor for CLASS 20: Ie(20)=14Ax1.42=19.9A

• Select corresponding Sprecher + Schuh KTB7-25S, KTB7-25H/32H or KTB7-45H from catalog using next higher current rating: KTB7-25H-25A

➋ Horsepower ratings shown in the table are for reference only. The final selection of the controller depends on the actual motor full load current and service factor.• For motor with service factor less than 1.15. Use motor nameplate full load current times 0.9 and choose the motor starter with the appropriate current range. Example:MotorF.L.C.=4.2A;S.F.=1.0.–(4.2Ax0.9=3.78A).SelectCatalogNumberKTB7-25S-4A.

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Motor Circuit ControllerSeries KTB7

KTB7 UL Ratings Application Chart

➊ UL 508, CSA 22.2 No. 14 for group installation, in connection with short-circuit protection device.➋ UL 508 Part III.

Device




Disconnect ➋



Breaker



480V 600V 480V 600V 480V 600V

KTA7-25S — Standard Interrupting Capacity

KTB7-25S-0.4A 65 47 450 65 47 65 47

KTB7-25S-1A 65 47 450 65 47 65 47

KTB7-25S-2.5A 65 30 450 65 30 65 30

KTA7-25…32H — High Interrupting Capacity

KTB7-25H-2.5A 65 30 450 65 30 65 30

KTB7-25H-4A 65 30 450 65 30 65 30

KTB7-25H-10A 65 30 450 65 30 65 30

KTB7-25H-16A 65 30 450 65 30 65 30

KTB7-25H-25A 30 30 450 30 30 30 30

KTB7-32H-32A 30 30 450 30 30 30 18

KTA7-45H — High Interrupting Capacity

KTB7-45H-25A 65 30 600 65 30 65 30

KTB7-45H-32A 65 30 600 65 30 65 30

KTB7-45H-45A 65 18 600 65 18 65 18

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Motor Circuit ControllerSeries KTV7

KTV7 Base Unit

KTV7-25H

➊ HP ratings shown are for reference. Final selection of MPCB is determined by actual motor full load current.➋ Not applicable at 575V.

Rated Operational Current (Ie)


Nominal Magnetic

Trip CurrentMaximum Short

Circuit Current [kA]

Maximum Horsepower Typi-cal ➊➋

Three Phase [HP]

Catalog Number Price[A] [A] [A] 480Y/277V 480V 200V 230V 460V 575VType E (groupmotor)KTV7-25H…32H — High Interrupting Capacity

1.6 1.0…1.6 82 65 65 1/4 1/3 1 ~ KTV7-25H-1.6A 314.07

2.5 1.6...2.5 82 65 65 1/2 3/4 1-1/2 ~ KTV7-25H-2.5A 314.07

4.0 2.5...4.0 82 65 65 1 1 3 ~ KTV7-25H-4A 314.07

6.3 4.0...6.3 82 65 65 1-1/2 2 5 ~ KTV7-25H-6.3A 314.07

10 6.3...10 130 65 65 3 3 7-1/2 ~ KTV7-25H-10A 334.80

16 10...16 208 65 65 5 5 10 ~ KTV7-25H-16A 357.60

20 14.5...20 260 65 65 5 7-1/2 15 ~ KTV7-25H-20A 372.11

25 18...25 325 30 30 7-1/2 7-1/2 20 ~ KTV7-25H-25A 404.24

29 24...29 406 ~ 30 7-1/2 10 20 ~ KTV7-32H-29A 490.27

32 27...32 448 ~ 30 7-1/2 10 25 ~ KTV7-32H-32A 490.27

Multi-motor installation

Controller/ Variable-Frequency DriveDisconnectSwitch

Series KTV7Self-Protected Combination Motor Controllers

Horsepower ratings shown in the table are for reference only. The final selection of the controller depends on the actualmotor full load current and service factor.• For motor with service factor less than 1.15. Use motor nameplate full load cur-

rent times 0.9 and choose the motor starter with the appropriate current range. Example: Motor F.L.C. = 4.2A; S.F. = 1.0. – 4.2A x 0.9 = 3.78A. Select Catalog Number KTV7-25H-4A.

DescriptionThe Sprecher+Schuh KTV7 series motor controllers are suitable for two types of applications under cULus listings:

(1)asaManual,Self-protectedMotorControlleror

(2)asaManualMotorControllerwithapprovalforgroupinstallation(andasamotordisconnect)

WhenUL/CSAlistedasamanual,self-protectedcombinationmotorcontroller, the KTV7 provides all of the necessary NEC requirements for protection and control of individual motor branch circuits without additionalprotectivedevices(perNEC430-52Coption6).

WhenKTV7devicesareappliedamanualmotorcontrollersingroupinstallations, then NEC group installation rules state these devices must be applied per the appropriate rules, which require the use of an upstream BCPD-branch circuit protection device (per NEC 430-53C option2).

The output frequency of the VFD must be limited to 400Hz or less to prevent thermal degradation. Various models of the KTV7 series self-protected combination motor controllers provide disconnection for motor branch circuits, branch-circuit and short-circuit protection (includingmagneticprotection),overload/thermalprotectionandmanual switching.

The KTV7 self-protected combination motor controllers are current limiting and have a fixed magnetic trip. Interrupt ratings at 400V and 480V are available up to 65KaIC. The VFD output pulse-width modulation frequency must be limited to 4 kilohertz or less. The circuit breakers provide motor overload protection with a trip class 10 characteristic.

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Motor Circuit ControllerSeries KTV7

KTV7 UL Ratings Application Chart

➊ UL 508, CSA 22.2 No. 14 for group installation, in connection with short-circuit protection device.➋ UL 508 Part III.➌ UL 508 Part IV.➍ Type E applications require use of the KT7-xx-TE terminal adaptor on KT7s.



Device



Disconnect ➋➎





Breaker





480V 600V 480V 600V 480Y/277V 600Y/347V 480Y/277V 600Y/347V

KTV7-25H…32H — High Interrupting CapacityKTV7-25H-1.6A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-2.5A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-4A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-6.3A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-10A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-16A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-20A 450 65 ~ 65 ~ 65 ~ 65 ~KTV7-25H-25A 450 30 ~ 30 ~ 30 ~ 30 ~KTV7-32H-29A 450 30 ~ 30 ~ ~ ~ ~ ~KTV7-32H-32A 450 30 ~ 30 ~ ~ ~ ~ ~

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AccessoriesSeries KT7

➊ X=Contact Closed O=Contact Open

Accessories for KT7

Accessory Description

Operator Position ➊

TypeConnection Diagram and

Terminal Markings ➋For Use

With Catalog Number Price

OFF ON Tripped

Front-Mounted Auxiliary Contact • 1-pole or 2-pole• No additional space

required• 300V max.

O X O 1 NOKTA7KTB7/KTC7/KTV7KTU7 ➌

KT7-PE1-10 25.08

X O X 1 NCKTA7/KTB7/KTC7/KTV7KTU7 ➌

KT7-PE1-01 25.08

O X O 1 NO KTA7/KTB7/KTC7/KTV7KTU7 ➌KF7

KT7-PE1-11 30.99

X O X 1 NC

O X O 1 NOKTA7/KTB7/KTC7/KTV7KTU7 ➌

KT7-PE1-20 30.99

O X O 1 NO

X O X 1 NCKTA7/KTB7/KTC7/KTV7KTU7 ➌

KT7-PE1-02 30.99

X O X 1 NC

Right Side-Mounted Auxiliary Contact• 2-pole• Adds 9 mm to the

width of the device• 600V max.

O X O 1 NO KTA7KTB7KTC7KTV7

KT7-PA1-20 38.66

O X O 1 NO

X O X 1 NC KTA7KTB7KTC7KTV7

KT7-PA1-02 38.66

X O X 1 NC

O X O 1 NO

KTA7KTB7KTC7KTV7

KT7-PA1-11 38.66

X O X 1 NC

➋

➌WhenKT7-PE_isusedwithKTU7CircuitBreakers,KT7-PEFCLoadTerminalCover is required to comply with UL489 terminal clearance standards.

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Accessories for KT7

➊ X=Contact Closed O=Contact Open


Operator Position ➊

TypeConnection Diagram and

Terminal Markings ➋For Use

With Catalog Number Price

OFF ON Tripped

Front-Mounted Trip Contact • 2-pole• Indicates

tripping of device

• No additional space required

• 300V max.

O X O 1 NO KTA7/KTB7/KTC7/KTV7KTU7 ➌

KT7-PEF1-S10/N10 47.37

O O XNO Trip

(Short-Circuit &Overload)

X O X 1 NC KTA7/KTB7/KTC7/KTV7KTU7 ➌

KT7-PEF1-S10/N01 47.37

O O XNO Trip


Right Side-Mounted Trip Contact• 2-pole• Indicates

tripping of motor protector

• Adds 9 mm to the width of the device

• 600V max.

O O XNO Trip


KTA7KTB7KTC7KTV7

KT7-PAF1-S10/M10 64.57

O O X NO Trip (Short-Circuit)

O O XNO Trip


KTA7KTB7KTC7KTV7

KT7-PAF1-S10/M01 64.57

X X O NC Trip (Short-Circuit)

X X ONC Trip


KTA7KTB7KTC7KTV7

KT7-PAF1-S01/M10 64.57

O O X NO Trip (Short-Circuit)

X X ONC Trip


KTA7KTB7KTC7KTV7

KT7-PAF1-S01/M01 64.57


O O X NO Trip (Short-Circuit) KTA7

KTB7KTC7KTV7

KT7-PAF1-M11 38.66


➋

➌WhenKT7-PE_isusedwithKTU7CircuitBreakers,KT7-PEFCLoadTerminalCover is required to comply with UL489 terminal clearance standards.

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Accessories for KT7

Accessory DescriptionFor Use With

AC Coil Voltage Catalog Number

Price50 HZ 60 HZ Shunt Trip Undervoltage

Undervoltage Trip• Left-side mounted• Adds 18 mm to the

width of the KT7 device• Automatically trips

motor protector when voltage falls below 35…70%

Shunt Trip• Left-side mounted• Adds 18 mm to the

width of the KT7 device• Trips motor protector

when voltage is applied remotely

KTA7 KTB7 KTC7 KTV7

KTU7

12V 14V KT7-AA-14V KT7-UA-14V

103.65

21V 24V KT7-AA-24V KT7-UA-24V24V 28V KT7-AA-28V KT7-UA-28V42V 48V KT7-AA-48V KT7-UA-48V

110V 120V KT7-AA-120V KT7-UA-120V110V 127V KT7-AA-127V KT7-UA-127V

220...230V KT7-AA-230V KT7-UA-230V240...260V KT7-AA-240V KT7-UA-240V

240V 277V KT7-AA-277V KT7-UA-277V380V 460V KT7-AA-460V KT7-UA-460V415V 480V KT7-AA-480V KT7-UA-480V525V 600V KT7-AA-600V KT7-UA-600V

DC Coil Voltage Shunt Trip Undervoltage Price9V DC KT7-AA-9D KT7-UA-9D

103.65

12V DC KT7-AA-12D KT7-UA-12D24V DC KT7-AA-24D KT7-UA-24D36V DC KT7-AA-36D KT7-UA-36D48V DC KT7-AA-48D KT7-UA-48D60V DC KT7-AA-60D KT7-UA-60D64V DC KT7-AA-64D KT7-UA-64D72V DC KT7-AA-72D KT7-UA-72D80V DC KT7-AA-80D KT7-UA-80D

➊ForOverload(thermal)TripofKT7.➋ForShort-Circuit(magnetic)TripofKT7.

Undervoltage Trip Connection Diagram

Shunt Trip Connection Diagram

➊

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➊

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➊ See Dimensions and Technical data in this section for design compatibility.➋ KTA7, KTB7 and KTC7 can be used with Series D or later KT7-H_ Handle

mechanism with “I-O” markings or Series E with “ON-OFF” markings.➌ KTU7 requires Series E or later to comply with UL489 “ON-OFF” Trip

markings.➍ See page F41 for assembly example and dimensions.➎ See page F42 for KT7-S_ handle dimensions.

Classic Handle Assembly, Type 1/4/4X/12

Accessory Description ColorLegend

➋

For use with...

Frame Size (Length)

Catalog Number Price

Classic Door Coupling Handle ➊➋➌•For3padlocks4...8mm(5/16”)

diameter• Type 1/3/3R/4/4X/12 and IP66• Interlock override capability• Can be modified for locking in ON posi-

tion• Ships with coupling — order extension

shaft and legend plate separately• See Technical Section for mounting

depth information

Gray/BlackO - I

OFF -ONTrip

KTA7, KTB7, KTC7, KTV7

➊➋

KTU7 ➌

65 x 65mm KT7-HTN 124.38

Red/YellowO - I

OFF -ONTrip

65 x 65mm KT7-HTRY 144.08

Extension Shaft ➊•Cuttorequiredlengthformountingdepth(adapter-door)• See Technical Section for mounting depth information

KT7-HTNKT7-HTRY

250 mm KT7-HT 36.48

400 mm KT7-HTL 52.86

Contemporary Handle Assembly, Type 3R/3/4/4X

Accessory Description ColorLegend

➋

For use with...

Frame Size (Length)

Catalog Number Price

Contemporary Door Coupling Handle ➎• Screw Fixing • Type 3R, 3, 12, 4, 4X, IP66 • Field configurable for defeatable or non-

defeatable • Ships with coupling — order extension

shaft and legend plate separately• Requires 30mm hole for mounting• For up to 2 padlocks

Black/Black

O - IOFF -ON

Trip KTA7KTB7KTC7KTV7KTU7

48.7 x 47mm

KT7-SB 44.06

Red/YellowO - I

OFF - ONTrip

48.7 x 47mm

KT7-SY 44.06

Extension Shaft•Cuttorequiredlengthformountingdepth(adapter-door)• See Technical Section for mounting depth information

KT7-SBKT7-SY

305mm (12”)

KT7-S1 22.18

533mm (21”)

KT7-S2 28.91

Handle Accessories

Accessory Description For use with...Catalog Number Price

Extension Shaft Support ➍• Provides consistent alignment of the KT7 shafts with handle or door

coupling•Recommendedforshaftlengths>200mm(7.8in)• 9mm in width and snaps on right side of KT_7 devices• Allows for one side-mount auxiliary

KT7-HT_ KT7-S_KT7-N_

KT7-SHS 24.98

Legend Plate•Marking:“Haupschalter”and“MainSwitch”(Black/Gray)•Marking:“Not-Aus”and“EmergencyOff”(Black/Yellow)

KT7-HT_KT7-S_

KT7-HTFCNKT7-HTFCRY 12.33

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Accessory Description Color For Use With Catalog Number Price

KT7-KRY1

KT7-DS

Lockable Twist Knob•For1padlock4...5mm(1/4”)dia.shackle• Can be locked in OFF position

Black KTA7, KTB7, KTC7, KTV7

KTU7

KT7-KN1 9.02

Red/Yellow KT7-KRY1 14.10

Locking Tag• Padlock attachment to the lockable handles•Uptothreepadlocks4...8mm(5/16”)shackle

RedKT7-KN1

KT7-KRY1KT7-45-KRY

KT7-DS 36.28

Terminal Adapter for Type E Applications ➊• Required on all KT7s used in UL Type E applications• May not be used with Bus Bars

KTA/B/C7/V7-25/32 KT7-25-TE1 11.61

KTA/B/C7-45 KT7-45-TE 17.31

Anti-Tamper Shield• Provides protection against inadvertent adjust-

ment of the current setting• 10 pieces per package (priceperpiece)

KTA7KTB7KTC7KTV7

KT7-25-CA 15.13

Screw Adaptor• For screw fixing of KT7 Motor Circuit Controller• 10 pieces per package (priceperpiece)

KTA7KTB7KTC7KTV7KTU7

KT7-45-AS 15.13

Accessories for KT_7


➊ Terminal Adaptors are supplied as standard on enclosed KT7 and CX7 starters, as well as, CL8, CL7 and CK7 assembled products, assuring they can be used in Type E applications. Alternatively, compact busbar supply block KT7-_-A2E or -A3E meet Type E requirements for terminal spacing.

➋ Minimum quantity is one package of 100. Price is each x 100 = total price.

Marking Systems

Component DescriptionPkg. Qty.

Catalog Number

Price Each

Label Sheet -1 sheet with 105 self-adhesive paper labels each, 6 x17mm

1 CA7-FMS

SeepageA54

Marking Tag Sheet -1 sheet with 160 perforated paper labels each, 6 x 17mm. To be used with transparent cover

1 CA7-FMP

Transparent Cover -To be used with Marking Tag Sheets

100➋

CA7-FMC

Tag Carrier -For marking with marker cards and tags. See page N6 for complete listing of available cards and tabs.

100➋

CA7-FMA2

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Connecting Modules (for connecting KTA7, KTB7 or KTC7 to CA8, CA7 AC coil, or CA7 Electronic DC coil contactors) ➋

Module DescriptionFor Connecting. . .

To Contactor. . . Catalog Number ➊ Price

Connecting Modules (forms Ecombo Starter) - ➊

• Provides electrical and mechanical interconnection ofKT7andCA8(withACorDCcoils),CA7(withACcoils)orCA7-_E(withElectronicDCcoils).

• Suitable for reversing and wye-delta kits

•Ecombostarter(withKT7-25/32)mountsonasingleDIN-rail(KT7mountsonDIN-rail)

•Ecombostarter(withKT7-45)canbemountedontwo DIN-rails or on Mounting Modules (see selection tablebelow)

• Contactor coil mounted on load side

KT_7-25S..32Sor KF7

CA8-9...12 12A max. KT7-25S-PEK12 66.02

KT_7-25S..32Sor KF7

CA7-9...23 CA7-9E...23E KT7-25S-PEC23 45.40

KT_7-25H..32H CA7-9...23 CA7-9E...23E KT7-25H-PEC23 45.40

KT_7-25H..32H CA7-30...37CA7-30E...37E KT7-25H-PNC37 45.40

KT_7-45H CA7-30...37CA7-30E...37E KT7-45H-PNC37 45.40

KT_7-45H CA7-43CA7-43E KT7-45H-PNC43 45.40

AccessoriesSeries KT7 & W Modules

➊ cURus Approved (File#E33916).

➋ Not for use with KTU7 Circuit Breakers

Type W Mounting Modules

Module DescriptionWidth (mm) Catalog Number Price

Short Mounting Module - Requires Connecting Module from tables above• Provides support for KT7 + CA7 or CA8• Top rail is specifically designed for KT7• Bottom rail is movable for easy assembly and disassem-

bly• Complete unit mounts to two 35mm DIN-rails or one

70mm DIN-rail or screw mounts• 228 mm high

45 W-32489

23.85

54 W-32490 27.68

Long Mounting Module - See Section D for Connecting Modules• Provides support for KT7 + PCS Softstarter,

CA7 + PCS Softstarter or KTB7 + CA7+CEP7• Top rail is specifically designed for KT7• Bottom rail is movable for easy assembly and disassem-

bly• Complete unit mounts to two 35mm DIN-rails or one

70mm DIN-rail or screw mounts• 283 mm high

45 W-32496 25.76

54 W-32497 29.58

Spacer for Mounting Module - Fits between 45mm and 54mm for Reversing applications (228mmhigh)

9 W-32955 14.31

Dovetail Joints - Used to connect two mounting modules together.(Soldinpackagesof50)

W-32954 0.95

Connecting Modules (for connecting KTA7, KTB7 or KTC7 to CA7 to make CLT7 type assemblies) ➋

Module DescriptionFor Connecting…

To Contactor. . .

Use Connector. . . ➊ Price

With Coil Module. . . Price

KT7-25S-PNC23

KT7-25S-PSC23

Connecting Modules• Provides electrical interconnection

of KT7 and CA7 contactors• Contactor Coil Module extends

A1/A2 Line Side terminals forward to facilitate wiring

• Contactor and motor protector must be mounted on two DIN-rails or on Mounting Module (see selection tablebelow)

KT_7-25S..32Sor KF7

CA7-9..23

KT7-25S-PNC23 45.40 KT7-25S-PSC23 22.39

KT_7-25H..32H KT7-25H-PNC23 45.40

KT_7-25H..32H

CA7-30..37

KT7-25H-PNC37 45.40

KT7-45H-PSC43 22.39 KT_7-45H KT7-45H-PNC37 45.40

KT_7-45H CA7-43 KT7-45H-PNC43 45.40

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Accessory Description For Use With Catalog Number Price

Compact Busbar — 45 mm Spacing (Rated 64 A)• For use with front-mounted auxiliary contact on KT_7 Motor Controllers

Connects 2 Motor Controllers Connects 3 Motor Controllers Connects 4 Motor Controllers Connects 5 Motor Controllers

KT_7-25…32SKT_7-25…32H

➌

KT7-32-DB-45-2KT7-32-DB-45-3KT7-32-DB-45-4KT7-32-DB-45-5

44.68 51.41 58.26 64.79

Compact Busbar — 54 mm Spacing (Rated 64 A)• For use with side-mounted auxiliary contact on KT_7 Motor Controllers

Connects 2 Motor Controllers Connects 3 Motor Controllers Connects 4 Motor Controllers Connects 5 Motor Controllers

KT_7-25…32SKT_7-25…32H

➌

KT7-32-DB-54-2KT7-32-DB-54-3KT7-32-DB-54-4KT7-32-DB-54-5

45.40 52.44 59.81 65.71

Compact Busbar — 54mm Spacing (Rated 120 A)• For use with front-mounted auxiliary contact on KT_7 Motor Controllers

Connects 2 Motor Controllers Connects 3 Motor Controllers Connects 4 Motor Controllers

KT_7-45HKT7-45-DB-54-2KT7-45-DB-54-3KT7-45-DB-54-4

68.51 81.89 99.82

Compact Busbar — 63 mm Spacing (Rated 120 A)• For use with side-mounted auxiliary contact on KT_7 Motor Controllers

Connects 2 Motor Controllers Connects 3 Motor Controllers Connects 4 Motor Controllers

KT_7-45HKT7-45-DB-63-2KT7-45-DB-63-3KT7-45-DB-63-4

70.69 92.97 120.23

KBH2KTA7-25S to 25H

Spacer for KT_7-25…32H to KT_7-25…32S• Accommodates difference in depth from KT_7-25H…32H to KT_7-25S…32S

• Aligns terminals for compact bus bar connection

KT_7-25…32S to

KT_7-25…32H ➌

KBH2 7.76

A3EA2E

Supply Block and Terminal• For power connection to Compact Busbar — 600V, KT_7-25/32…63A max. / KT_7-45…120A maxi-mum

• Top feed — overlaps commoning link• Meets requirements for terminal spacing from source in Type E applications• KT7-25-A2E and KT7-45-A2E are primarily used for bottom cable feed

KT_7-25…32S or

KT_7-25…32H ➌

KT7-25-A2E 70.79

KT7-32-A3E 47.58

KT_7-45H

KT7-45-A2E 126.45

KT7-45-A3E 111.95

Terminal Cover• For covering of unused connection terminals• IP2X finger protection

KT_7-25...32KT_7-45H

KT7-32-DBA KT7-45-DBA

8.709.27

Compact Busbar System for KTA7, KTB7 and KTC7 Motor Controlers ➊➋➍

➊ULApproved(File#E33916);CSAApproved(File#13908).➋ Compact busbar may not be applied with KT7-25-TE1 or KT7-45-TE Terminal

Adaptors. Either Terminal Adaptors or Bus Bar may be used, not both.➌ KT7-25…32S and KT7-25…32H may not be combined without KBH2.➍ Not for use with KTU7 Circuit Breakers


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Fuse HoldersSeries KF7

AccessoryConnection

Diagram Description Catalog Number Price

2715

16 28

A1

A2

M

Auxiliary Contact for KF7 Fuse Holder(1 NO Late Make + NC Early Break)

• NO Late Make, provides positive indication that power circuit is open• NC Early Break, provides capability for dropping out contactor before breaking

current on fuse

KF7-PE1-11 31.41


Approvals

Catalog Number PriceIEC/CE UL/CSA

KF7 Fuse Holder, CC - 30A Yes Yes KF7-D3C-C30 64.16

Blown Fuse Indicator

KF7 Fuse Holder with Blown Fuse Indication, CC - 30A Yes Yes KF7-D3C-C30L 90.28

KF7 Fuse Holder to be used with KT7 or CA8/CA7 ➎

KF7 is Compatible with KT7 Compact Busbar ➍

Applying KF7 with KTA7 Motor Circuit Controllers and CA7 Contactors

KF7 can be applied on the line side of a multiple small KTA7 motor circuit controller or a single KTA7 controller and CA7 contactors to increase the short-circuit protection of the group or a single branch circuit. KF7 is compatible with the KT7compactbusbars(asshowninSectionF),which reduces the space requirement as well as installation time.

Applying KF7 with CA7 ContactorsKF7 can be applied on the line side of CA7 contactors to increase the short-circuit withstand rating. The cUL withstand rating of CA7 when protected by Type “CC” fuses is increased to 100KAIC as shown on page A72.

Lockable in Open Position

Connector to Contactor

➊

➋

➌

➊ The KF7 terminal spacing and height are the same as KT_7-25S. Reference page F17 tables to select a connector.➋ IfusingaKT7-25S-PEK12(withCA8)orKT7-25S-PEC23(withCA7),closecoupleconnector,thenthepairmountsonasingleDINrailundertheKF7.➌ Using a KT7-25S-PNC23 to mount a KF7 with a standard CA7 with AC Coil requires two DIN rails. The A1-A2 terminals of a standard CA7 with AC Coil can be turned to the load side. In this case a KT7-25S-PSC23 would not be required.➍ KF7 can not be mounted directly to a KT_7 using a PEK, PEC or PNC Connector. KF7, used in connection with a Compact Bus Bar, can provide Group

Fusing protection for multiple bus bar connected KT_7.➎ For dimensions and wiring diagrams see page F44.

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